He faces a lengthy spell out, even if there is hope he could return sooner than expected.

Discussing the tackle, United legend Keane told ITV: “I thought it was a brilliant challenge.

“I love the physical side of the game. You can always tell by player reactions and none of the United lads at the time, and players are best judges because they are nearest the tackle, didn’t react over the top thinking it was a bad challenge.

Keane after his infamous challenge on Alfie Haaland in 2001

“And when players are travelling that speed, defending like that, injuries are going to happen. I’m surprised there are not more like it.

“It was more of an accident at the end of with his trailing foot.”

Former United captain Keane was known for his no-nonsense style, including an infamous challenge on Alfie Haaland in 2001.

Louis van Gaal believed Moreno should have been sent off for the challenge, but former referee Howard Webb said Italian official Nicola Rizzoli made the right call in not issuing a red card.